Hot water heater shell



Nov, 3, 1936. R R. LEGG 7 2,059,371

HOT WATER HEATER SHELL Filed Feb. 19, 1936 Patented Nov. 3, 1936 UNITED STATES PATENT OFFICE HOT WATER. HEATER SHELL Richard R. Legg, Oklahoma City, Okla.

Application February 19, 1936, Serial No. 68,770

1 Claim.

' surfaces of boilers become furred after use by deposits on such surfaces from the water heated therein. It is .also well known that such deposits decrease the heating efficiency of the boilers to such extent as to render them useless, unless the deposits, or scale, be removed at frequent intervals.

The main object of the invention is to provide a shell for domestic use, with its main parts so arranged as to be readily taken apart for cleaning purposes, and as readily reassembled.

Other objects of the invention will become apparent as the detailed description thereof pro- 'ceeds.

In the drawing:

Figure 1 is a central vertical section through a domestic boiler embodying my invention; and

Figure 2 is a perspective view of a member forming the bottom of the boiler having a flue integrally connected thereto.

In the. accompanying drawing the reference numeral 3 designates the cylindrical shell of a domestic boiler having a head 4 formed integral therewith. The head 4 is provided with the usual water inlet 5v and hot water outlet 6. The head 4 is also provided with a central aperture I adapted to receive slidably the upper end of the flue 8; and this flue 8 has a flange 9 suitably secured, as by welding, to the upper part thereof. The flange 9 is shaped to correspond to the shape of the inner surface of the head 4 and has suitably fixed thereto a series of bolts I adapted to extend through aperture I I formed in the head 4.

Preferably, the shanks of the bolts II) are permanently secured to the flange 9 as by welding or by tight friction fit in the apertures I2 formed in said flange 9 to receive them. The screwthreaded ends of the said bolts extend'through apertures II and through registering apertures I3 formed in a washer I4 which is shaped to fit snugly around the upper end of the flue 8 and against the curved outer surface of the head 4.

It is not, of course, essential that the head 4 be made integral with the cylindrical part3. Obviously, it may be made separate and secured suitably to the upper end of the part 3 by welding or in any other suitable manner. The shape of the head may be varied indefinitely, and the flange 9 and washer I4 would be correspondingly shaped.

When the flue 8 is secured in position on the head 4 it extendsdownwardly in the shell 3 and coaxial therewith, to connect with the bottom I5. The bottom I is apertured to receive the lower end of the flue 8, which is then welded or otherwise permanently fixed to the said bottom [5. Preferably, the bottom I5 is dome shaped as shown in the drawing. However, the outer part thereof is shaped to form an annular flange I6 which is provided with apertures I'I adapted to receive the shanks of bolts I8.

The lower end of the shell 3 is shaped to form an outwardly directed annular flange I9 apertured to receive the shanks of the bolts I8 which pass through the aperture IT in the bottom I5. A burner casing 20 of about the, same diameter as the shell 3 is provided at its upper end with an outwardly directed flange 2|, which is also apertured to receive the shanks of the bolts I8. A suitable gasket 22 is apertured also to receive the bolts I8 and is intended to be positioned between the flanges IS and I9 of the bottom I5 and shell 3, respectively.

It will be obvious from inspection of the drawing that when the bolts I0 are loosened from the,

head 4 and the bolts I8 are also withdrawn from the registering apertures in the flanges I6, I9 and 2|, the flue and bottom can be removed from the shell 3 as a unit, and all scale or other deposits can be readily removed therefrom. The removal of the flue and bottom from the shell 3 also givesaccess to the interior of the shell for cleaning purposes. It will be noted that all the bolts of this device are arranged on the outside of the heater and are therefore not harmfully affected by the heat of the boiler or the deposits in the water heated therein. Furthermore, these bolts and their nuts are readily accessible from the outside of the heater, so that it requires'no tool but a wrench. to effect the separation of the several parts of the heater.

It is to be understood that the invention is not to be considered as limited to the specific construction and. arrangement described herein,

What I claim is: A hot water heater comprising a shell having a top provided with a central flue aperture and with bolt receiving apertures around said central flue aperture, said shell having its lower end shaped to provide an outwardly directed flange, a flue extending lengthwise within said shell and slidably through said flue aperture, 9. bottom for said shell permanently connected with the lower 

